Right Triangles Calculator

Enter what you know below:
Right Triangle
Angle ASide aAngle BSide bSide c (Hypotenuse)

The formula for a right triangle relation of sides is a2 + b2 = c2
Taking the square root of both sides, we get c = √a2 + b2
c = √202 + 452
c = √400 + 2025
c = √2425
c = 49.

Calculate Angle A:
sin(A) =OPPOSITE
HYPOTENUSE

sin(A) =a
c

sin(A) =20
49.

Sin(A) = 0.45
Angle A = 23.9625°

Calculate Angle B:
sin(B) =OPPOSITE
HYPOTENUSE

sin(B) =b
c

sin(B) =45
49.

Sin(B) = 0.26
Angle B = 66.0375°

Calculate inradius:
inradius =ab
a + b + c

inradius =(20)(45)
20 + 45 + 49.

inradius =900
898

inradius = 7.7

Summary
Angle A23.9625°
Side A20
Angle B66.0375°
Side B45
Side C49.
inradius7.7